<template>
  <el-container class="home-container">
    <!--头部区域-->
    <el-header>
      <div>
        <img src="../assets/logo.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!--页面主体区-->
    <el-container>
      <!--左边区域-->
      <el-aside :width="isCollapse ? '64px':'200px'">
        <div class="toggle-button" @click="toggleCollapse" >|||</div>
        <!---侧边菜单栏-->
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409eff"
                 :unique-opened="true" :collapse="isCollapse" :collapse-transition="false"
                 :router="true" :default-active="activePath">
          <!--一级菜单-->
          <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
            <!--一级菜单模版区-->
            <template slot="title">
              <!--图标-->
              <i :class="iconObj[item.id]"></i>
              <!--文本-->
              <span>{{item.authName}}</span>
            </template>

            <!--二级菜单-->
            <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id"
                           @click="saveNavState('/'+subItem.path)">
              <template slot="title">
                <!--图标-->
                <i class="el-icon-menu"></i>
                <!--文本-->
                <span>{{subItem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!--右边区域-->
      <el-main>
        <!--陆游占位符-->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
    export default {
      data() {
        return {
          menulist:[],
          iconObj:{
            '125':'el-icon-menu',
            '103':'el-icon-location',
            '101':'el-icon-eleme',
            '102':'el-icon-delete',
            '145':'el-icon-setting'
          },
          //默认不折叠
          isCollapse:false,
          //被激活的链接地址
          activePath:''
        }
      },
      created() {
        this.getMenuList()
        this.activePath=window.sessionStorage.getItem('activePath')
      },
      methods:{
        logout(){
          window.sessionStorage.clear();
          this.$router.push("/login");
        },
        //获取所有菜单
        async getMenuList() {
        const {data:res}=await this.$http.get('menus')
          if (res.meta.status !==200) return this.$message.error(res.meta.msg)
          this.menulist=res.data
        },
        //按钮切换菜单折叠展开
        toggleCollapse(){
          this.isCollapse=!this.isCollapse
        },
        //保存路径的激活状态
        saveNavState(activePath){
          window.sessionStorage.setItem('activePath',activePath)
          this.activePath=activePath
        }
      }
    }
</script>

<style lang="less" scoped>
  .home-container{
    height: 100%;
  }

  .el-header{
    background-color: #373D41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #ffffff;
    font-size: 20px;
    > div {
      display: flex;
      align-items: center;
      span{
        margin-left: 15px;
      }
    }
  }

  .el-aside{
    background-color: #333747;
    .el-menu{
      border-right: none;
    }
  }

  .el-main{
    background-color: #eaedf1;
  }

  .iconfont{
    margin-right: 10px;
  }

  .toggle-button{
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;
    color: #ffffff;
    text-align: center;
    cursor: pointer;
  }
</style>
